如何獲得一個城市的緯度，谷歌地圖上的替代API只有城市的名稱

我試圖找到一個城市的經度和緯度，只有它的名字。如何獲得一個城市的緯度，谷歌地圖上的替代API只有城市的名稱

我試圖只使用Gmaps API，並避免使用Google爲地理定位提供的web服務。

2010-03-14 perrohunter

字面上只有這個城市嗎？這將是有問題的，因爲給定的城市名稱可能代表許多不同的地點。城市名稱沒有唯一性。 – Thomas 2010-03-14 02:01:18

做搜索後，你可以得到座標低谷place.Point.coordinates

例如：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> 
    <html xmlns="http://www.w3.org/1999/xhtml" xmlns:v="urn:schemas-microsoft-com:vml"> 
     <head> 
     <meta http-equiv="content-type" content="text/html; charset=utf-8"/> 
     <title>Google Maps API Sample</title> 
     <script src="http://maps.google.com/maps?file=api&amp;v=2&amp;sensor=false&amp;key=ABQIAAAA1XbMiDxx_BTCY2_FkPh06RRaGTYH6UMl8mADNa0YKuWNNa8VNxQEerTAUcfkyrr6OwBovxn7TDAH5Q"></script> 
     <script type="text/javascript"> 

     var map; 
     var geocoder; 

     function initialize() { 
     map = new GMap2(document.getElementById("map_canvas")); 
     map.setCenter(new GLatLng(34, 0), 1); 
     geocoder = new GClientGeocoder(); 
     } 

     // addAddressToMap() is called when the geocoder returns an 
     // answer. It adds a marker to the map with an open info window 
     // showing the nicely formatted version of the address and the country code. 
     function addAddressToMap(response) { 
     map.clearOverlays(); 
     if (!response || response.Status.code != 200) { 
      alert("Sorry, we were unable to geocode that address"); 
     } else { 
      place = response.Placemark[0]; 
      point = new GLatLng(place.Point.coordinates[1], 
           place.Point.coordinates[0]); 
      marker = new GMarker(point); 
      map.addOverlay(marker); 
    -->  // here you get the coordinates of the founded point 
      marker.openInfoWindowHtml('<b>Coordinates:</b> ' + place.Point.coordinates); 
     } 
     } 

     // showLocation() is called when you click on the Search button 
     // in the form. It geocodes the address entered into the form 
     // and adds a marker to the map at that location. 
     function showLocation() { 
     var address = document.forms[0].q.value; 
     geocoder.getLocations(address, addAddressToMap); 
     } 

     // findLocation() is used to enter the sample addresses into the form. 
     function findLocation(address) { 
     document.forms[0].q.value = address; 
     showLocation(); 
     } 

     </script> 
     </head> 
     <body onload="initialize()" onunload="GUnload()" style="font-family: Arial;border: 0 none;"> 
     <!-- Creates a simple input box where you can enter an address 
      and a Search button that submits the form. //--> 
     <form action="#" onsubmit="showLocation(); return false;"> 
      <p> 
      <b>Search cities:</b> 
      <input type="text" name="q" value="" class="address_input" size="40" /> 
      <input type="submit" name="find" value="Search" /> 

      </p> 
     </form> 
     <div id="map_canvas" style="width: 500px; height: 300px"></div> 
     </body> 
    </html>

來源

2010-03-14 02:51:28 frx08

如何獲得一個城市的緯度，谷歌地圖上的替代API只有城市的名稱

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